Toyota Corolla 2004 with bad battery ..

Does anyone give me a clue where to start? They placed the battery from the corolla from the Bathroom .. now, after correcting it, it started .. but it has many variations in the engine .. what could be affected?

Hello friend, what variations do you mean? In general, when disconnecting the battery, certain alterations in the motor march are produced, change it a few kms and the computer will learn all the new parameters that occur, it never really stops learning and is correcteding on the march, tell us how you go, greetings.

Here is my experience .. As you said
Jal ... the computer learned the new parameters ... the engine variation was regulated. It caught my attention that when putting in contact, they only lit the light of check and airbag .. The rest of the panel does not work .. when it starts everything off. No accessory work (AA, RPM, witness lights, etc.) that makes me think that the alternator is not working and I measure it, and indeed I do not load ... now I get ready to disassemble it ..

Hello, before disassembling the alternator, check the link fuses, those that are next to the positive terminal,
80 or 100a, if the battery has been put upside down, surely some will have been melted and that is why some part of the electrical system does not work for you. Greetings

I already changed all the burned fuses .. and the problem still persists ..